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Levart [38]
3 years ago
13

Multiply.

Mathematics
2 answers:
mariarad [96]3 years ago
7 0

Answer:

6x^3+7x^2+2x

Step-by-step explanation:

beks73 [17]3 years ago
5 0

Answer:

D) 6x³ + 7x² + 2x

Step-by-step explanation:

2x × 3x² = 6x³

2x × 2x = 4x²

1 × 3x² = 3x²

1 × 2x = 2x

Collect like terms to get

6x³ + 7x² + 2x

Hope this helps ya!

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X-4y=32 in slope intercept form
Alex777 [14]

Answer:

-4y = -x + 32

y = x/4 - 8

or y = (1/4)x - 8

Step-by-step explanation:

7 0
3 years ago
A number between 55 and 101 that is a multiple of 2, 8, and 16
ch4aika [34]
Ànswer is 64 , 80, and 96
5 0
3 years ago
how many different shapes can you make with the 4 triangles cut from this rectangle? how do you know?
Dima020 [189]
Where is the rectangle, I will help you when you show me the rectangle because I need the rectangle
8 0
3 years ago
A small plane took 3 hours to fly 960 km from Ottawa to Halifax with a tail wind. On the return trip, flying into the wind, the
Rina8888 [55]

Answer:

  • Wind speed: \rm 40\; km \cdot h^{-1}.
  • Speed of the plane in still air: \rm 320\; km \cdot h^{-1}.

Step-by-step explanation:

This problem involves two unknowns:

  • wind speed, and
  • speed of the plane in still air.

Let the speed of the wind be x \rm \; km \cdot h^{-1}, and the speed of the plane in still air be y\rm \; km \cdot h^{-1}. It takes at least two equations to find the exact solutions to a system of two variables.

Information in this question gives two equations:

  • It takes the plane three hours to travel \rm 960\; km from Ottawa to with a tail wind (that is: at a ground speed of x + y.)
  • It takes the plane four hours to travel \rm 960\; km from Halifax back to Ottawa while flying into the wind (that is: at a ground speed of -x + y.)

Create a two-by-two system out of these two equations:

\left\{ \begin{aligned}&3(x + y) = 960 && (1) \\ &4(-x + y) = 960 && (2) \end{aligned}\right..

There can be many ways to solve this system. The approach below avoids multiplying large numbers as much as possible.

Note that this system is equivalent to

\left\{ \begin{aligned}&4 \times 3 (x + y) = 4\times960 && 4 \times (1) \\ &3\times 4(-x + y) = 3\times 960 && 3 \times (2) \end{aligned}\right..

\left\{ \begin{aligned}&12 x + 12y = 4\times960 && 4 \times (1) \\ &- 12x + 12y = 3\times 960 && 3 \times (2) \end{aligned}\right..

Either adding or subtracting the two equations will eliminate one of the variables. However, subtracting them gives only 1 \times 960 on the right-hand side. In comparison, adding them will give 7 \times 960, which is much more complex to evaluate. Subtracting the second equation (3 \times (2)) from the first (4 \times (1)) will give the equation

(12 - (-12) x = 1 \times 960.

24 x = 960.

x = 40.

Substitute x back into either equation (1) or (2) of the original system. Solve for y to obtain y = 320.

In other words,

  • Wind speed: \rm 40\; km \cdot h^{-1}.
  • Speed of the plane in still air: \rm 320\; km \cdot h^{-1}.
3 0
3 years ago
Read 2 more answers
Is 45.6 a irrational number!!???
notsponge [240]
No

Mark brainliest please


Hope this helps you
6 0
2 years ago
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